W129AG

W129AG Features

• Two clock outputs • Cycle-to-cycle jitter absolute value less than 250 ps • Supports 3.3V ±10% operation • TTL compatible logic: VIL = 0.8 Vmax, VIH = 2.0 Vmin,VOL = 0.4 Vmax, and VOH = 2.4 Vmin • OE and CTRL1 pins have internal pull-up • CTRL2 and CTRL3 pins have internal pull-down • 45/55% duty cycle on all outputs • 25-Ohm output drivers • Accepts 13.5-MHz input reference • Built-in crystal oscillator circuit. The load presented tothe crystal is 14 pF

W129AG General Description

The W129A was designed to provide all the necessary timingsignals for a home video game system. In order to facilitatepassage of regulatory EMI testing, Cypress provides a rangeof options for its proprietary Spread Spectrum EMI reductiontechnique. Only the system clock utilizes the Spread Spec-trum feature; the video clock runs at a steady frequency toensure a high-quality picture.

W129AG Functional Description